1
|
Meglič SH, Pavlin M. The impact of impaired DNA mobility on gene electrotransfer efficiency: analysis in 3D model. Biomed Eng Online 2021; 20:85. [PMID: 34419072 PMCID: PMC8379608 DOI: 10.1186/s12938-021-00922-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 08/09/2021] [Indexed: 11/21/2022] Open
Abstract
Background Gene electrotransfer is an established method that enables transfer of DNA into cells with electric pulses. Several studies analyzed and optimized different parameters of gene electrotransfer, however, one of main obstacles toward efficient electrotransfection in vivo is relatively poor DNA mobility in tissues. Our aim was to analyze the effect of impaired mobility on gene electrotransfer efficiency experimentally and theoretically. We applied electric pulses with different durations on plated cells, cells grown on collagen layer and cells embedded in collagen gel (3D model) and analyzed gene electrotransfer efficiency. In order to analyze the effect of impaired mobility on gene electrotransfer efficiency, we applied electric pulses with different durations on plated cells, cells grown on collagen layer and cells embedded in collagen gel (3D model) and analyzed gene electrotransfer efficiency. Results We obtained the highest transfection in plated cells, while transfection efficiency of embedded cells in 3D model was lowest, similarly as in in vivo. To further analyze DNA diffusion in 3D model, we applied DNA on top or injected it into 3D model and showed, that for the former gene electrotransfer efficiency was similarly as in in vivo. The experimental results are explained with theoretical analysis of DNA diffusion and electromobility. Conclusion We show, empirically and theoretically that DNA has impaired electromobility and especially diffusion in collagen environment, where the latter crucially limits electrotransfection. Our model enables optimization of gene electrotransfer in in vitro conditions.
Collapse
Affiliation(s)
- Saša Haberl Meglič
- Faculty of Electrical Engineering, Laboratory of Biocybernetics, University of Ljubljana, Tržaška 25, 1000, Ljubljana, Slovenia
| | - Mojca Pavlin
- Faculty of Medicine, Institute of Biophysics, University of Ljubljana, Vrazov trg 2, 1000, Ljubljana, Slovenia. .,Faculty of Electrical Engineering, Group for Nano and Biotechnological Applications, University of Ljubljana, Tržaška 25, 1000, Ljubljana, Slovenia.
| |
Collapse
|
2
|
Yao C, Lv Y, Dong S, Zhao Y, Liu H. Irreversible electroporation ablation area enhanced by synergistic high- and low-voltage pulses. PLoS One 2017; 12:e0173181. [PMID: 28253331 PMCID: PMC5333894 DOI: 10.1371/journal.pone.0173181] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 02/16/2017] [Indexed: 11/18/2022] Open
Abstract
Irreversible electroporation (IRE) produced by a pulsed electric field can ablate tissue. In this study, we achieved an enhancement in ablation area by using a combination of short high-voltage pulses (HVPs) to create a large electroporated area and long low-voltage pulses (LVPs) to ablate the electroporated area. The experiments were conducted in potato tuber slices. Slices were ablated with an array of four pairs of parallel steel electrodes using one of the following four electric pulse protocols: HVP, LVP, synergistic HVP+LVP (SHLVP) or LVP+HVP. Our results showed that the SHLVPs more effectively necrotized tissue than either the HVPs or LVPs, even when the SHLVP dose was the same as or lower than the HVP or LVP doses. The HVP and LVP order mattered and only HVPs+LVPs (SHLVPs) treatments increased the size of the ablation zone because the HVPs created a large electroporated area that was more susceptible to the subsequent LVPs. Real-time temperature change monitoring confirmed that the tissue was non-thermally ablated by the electric pulses. Theoretical calculations of the synergistic effects of the SHLVPs on tissue ablation were performed. Our proposed SHLVP protocol provides options for tissue ablation and may be applied to optimize the current clinical IRE protocols.
Collapse
Affiliation(s)
- Chenguo Yao
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing, China
- * E-mail:
| | - Yanpeng Lv
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing, China
| | - Shoulong Dong
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing, China
| | - Yajun Zhao
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing, China
| | - Hongmei Liu
- The State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing, China
| |
Collapse
|
3
|
How transient alterations of organelles in mammalian cells submitted to electric field may explain some aspects of gene electrotransfer process. Bioelectrochemistry 2016; 112:166-72. [DOI: 10.1016/j.bioelechem.2016.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 02/10/2016] [Accepted: 02/17/2016] [Indexed: 11/22/2022]
|
4
|
Pasquet L, Bellard E, Rols MP, Golzio M, Teissie J. Post-pulse addition of trans-cyclohexane-1,2-diol improves electrotransfer mediated gene expression in mammalian cells. Biochem Biophys Rep 2016; 7:287-294. [PMID: 28955917 PMCID: PMC5613639 DOI: 10.1016/j.bbrep.2016.07.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/08/2016] [Accepted: 07/14/2016] [Indexed: 12/17/2022] Open
Abstract
Electric field mediated gene transfer is facing a problem in expression yield due to the poor transfer across the nuclear envelope. Trans-cyclohexane-1,2-diol (TCHD) was shown to significantly increase chemically mediated transfection by collapsing the permeability barrier of the nuclear pore complex. We indeed observed a significant increase in expression by electrotransfer when cells are treated post pulse by a low non toxic concentration of TCHD. This was obtained for different pulsing conditions, cell strains and plasmid constructs. An interesting improvement in cell viability can be obtained. This can significantly enhance the non-viral gene electrical delivery. Trans-cyclohexane-1,2-diol (TCHD) collapses the permeability barrier of the nuclear pore complex. TCHD improves expression in gene electrotransfer. Post pulse TCHD addition is the most effective protocol. TCHD does not affect the cell viability when coupled to electrotransfer.
Collapse
Affiliation(s)
- L Pasquet
- Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, BP64182, 205 route de Narbonne, F-31077 Toulouse, France.,Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - E Bellard
- Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, BP64182, 205 route de Narbonne, F-31077 Toulouse, France.,Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - M P Rols
- Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, BP64182, 205 route de Narbonne, F-31077 Toulouse, France.,Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - M Golzio
- Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, BP64182, 205 route de Narbonne, F-31077 Toulouse, France.,Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| | - J Teissie
- Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, BP64182, 205 route de Narbonne, F-31077 Toulouse, France.,Centre National de la Recherche Scientifique, Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, UPS, IPBS, F-31077 Toulouse, France
| |
Collapse
|